Multiple choice technology testing What is the model number for the 4 port eMTA box? 42G 504 68G None of the above Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Arris 504 model is the 4-port eMTA (Embedded Multimedia Terminal Adapter) device used in cable telecommunications. The model numbers are specific: 42G is a 2-port variant, while 504 designates the 4-port configuration.